Device for deweighting scale-beams.



N0. 686,|99. Patented NOV. 5, I9Ul. W. F. BRAUN. DEVICE FOR DEWEIGHTINGSCALE BEAMS.

cfldvorngg, I

(Application filedjln. 1.82301.)

m: NOHIHS warms co, PHOT umofwAsH UNITED STATES PATENT OEEIcE.

WILLIAM F. BRAUN, on CHICAGO, ILLINoIs.

DEVICE FOR DEWEIGHTING SCALE-BEAMS.

SPECIFICATION forming part of Letters .Patent No. 686,199, datedNovember 5, 1901.

Application filed January 18, 1901. Serial No. 43,826. (No model.)

T0 at whom it may concern.- 7

Be it known that I, WILLIAM F. BRAUN, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Devices for DeweightingScale-Beams and I do hereby declare the following to be afull, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to an improvement. in weighing-machines or scales,the object being to provide a scale in which the pressure on the pivotson which the scale-beam rest-s will be reduced to the lowest practicalpoint in order to reduce the load and consequent wear and friction onthe pivots; and it consists in the features of construction andcombinations of parts hereinafter fully described and claimed.

In the accompanying drawings, illustrating my invention, Figure l is aside elevation of a scale-beam made in accordance with my invention.Fig. 2 is a top plan view of same, showing one of the floats in section.Fig. 3 is a cross-section on line 3 3 of Fig. 2. Fig. I

is a detail section on line 4 4 of Fig. 3.

In said drawings, A represents an H -shaped scale-beam, which is adaptedto support receptacles B at each end between its extending arms 0 onknife-edge pivots D, said beam A being adapted to be supported on theframe E by means of the knife-edge pivots F and the floats G. Saidpivots F comprise knife-edge members H, rigidly mounted in said frame E,and upper members I, provided with V- shaped recesses J, which arerigidly mounted in said beam A and adapted to rest on said members H.Said floats G are cylindrical in shape and are mounted within casings orreceptacles K on members L of said beam A concentric with the centerline of oscillation drawn through the apex of said V-shaped recesses Jin said members I. Said casings K are adapted to contain a liquid,preferably mercury, adapted to support said floats G. Said members L, onwhich said floats G are mounted, practically form extensions of thecentral cross-bar M of said beam A and are oflfset downwardly by meansof the arms N ,to bring them in line with said center line ofoscillation, before mentioned.

have shown one of said receptacles K with the upper portion or cover 0removed and the float G in section. The inner walls of said casings Kare cut away above and below said member L, so as to allow a freevertical movement of said members as said float rises and lowers, due tothe load on said beam.

In operating my device said beam A is normally supported above itsproper weighing position by means of said floats G. As said beam isloaded said floats G are depressed into the liquid in said casings Kuntil the beam A is loaded to its proper capacity, when said beam willrest lightly on said knife-edge pivots F, and it can be quickly andaccurately balanced with practically no friction or wear on said pivots.

I claim as my invention- 1. In a weighing-scale, having a walkingbeam,supported on pivots, means for relieving said pivots from pressure,comprising floats carried by said beam in line with said pivots, casingssurrounding said floats and adapted to contain a liquid to support saidfloats.

2. A weighing-scale comprising a walkingbeam supported on knife-edgepivots, receptacles pivo'tally mounted on the outer ends of said beam,means for relieving the pivots of said beam from pressure, comprisingfloats mounted on said beam in line with the edges of said pivots andcasings surrounding said floats adapted to contain a liquid to supportsaid floats.

3. In a weighing-scale,the combination with a walking-beam adapted to besupported on knife-edge pivots, of said pivots, and fluidpressure meansfor automatically raising said walking-beam out of engagement with saidpivots when said beam is relieved of load.

4. Inaweighing scale the combination with a walking-beam supported onknife-edge pivots, of means for relieving said pivots of pressure,comprising floats mounted on said beam in line with the edges of saidpivots, and easing surrounding said floats adapted to contain a liquid.

5. In a weighing-scale,the combination with pivot members, and awalking-beam adapted to be supported thereon, of fluid-displacingdevices carrying said walking beam and In Fig. 2 I

adapted to counterbalance a portion of the weight of the latter and itsload, whereby the pivot members are relieved of load.

6. In a weighing-scale,the combination with knife-edge pivot members,and a walkingbeam pivotally movable thereon, of liquiddisplacing devicesadapted to partially support said walking-beam and its load, therebyrelieving said pivot members of such portion of the load.

7. In a weighing-scale,the combination with a rigid member carryingpivot members, and

a Walking beam carrying pivot members adapted to engage said first-namedpivot members, of fluid-pressure counterbalancing devices engaging saidpivot members of said walking-beam and adapted to counterbalance

